I think Arsenal wouldn't be a perfect place for Rodrigo because Arsenal already has good wingers, and if they sign another winger the it would be hard for them to used Rodrigo in X11 sheet. Manchester city left wing is already empty after the departure of Jack Grealish and so in Manchester City he has a higher probability of playing in the X11 sheet.
Arsenal have wingers but you cannot compare the wingers they have in that left wing position to Rodrygo. I’m already fed up with Martinelli and Trossard isn’t a player for the future his stay at the club is already shortened to 2026 so it will be best to bring in more fire power. Rodrygo definitely fits in that position as he will boost Arsenal’s attack.